Initial cloud-services repo - gateway service + pkg modules

pkg/validator/error.go

@@ -0,0 +1,67 @@
+package validator
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/go-pg/pg/v10"
+	"github.com/go-playground/validator/v10"
+)
+
+func GetValidationErrorMsg(err error) (bool, string) {
+	valerr, ok := err.(validator.ValidationErrors)
+	if ok {
+		return true, GetError(&valerr)
+	}
+
+	fielderr, ok := err.(*FieldError)
+	if ok {
+		return true, fielderr.Error()
+	}
+
+	pgerr, ok := err.(pg.Error)
+	if ok && pgerr.IntegrityViolation() {
+		return true, pgerr.Field(68)
+	}
+
+	return false, err.Error()
+}
+
+func GetError(errs *validator.ValidationErrors) string {
+	size := len(*errs)
+	msg := make([]string, size)
+	for i, err := range *errs {
+		key := err.Field()
+		if len(key) == 0 {
+			key = err.Tag()
+		}
+		msg[i] = fmt.Sprintf("%s %s", key, readableValidationError(err.Tag(), err.Param(), err.Value()))
+	}
+
+	return strings.Join(msg, ". ")
+}
+
+func readableValidationError(tag string, param string, value interface{}) string {
+	switch tag {
+	case "required":
+		return tag
+	case "lte":
+		return fmt.Sprintf("greater than %s", param)
+	case "gte":
+		return fmt.Sprintf("less than %s", param)
+	case "len":
+		return fmt.Sprintf("not %s length", param)
+	case "max":
+		return fmt.Sprintf("greater than %s length", param)
+	case "min":
+		return fmt.Sprintf("less than %s length", param)
+	case "serial":
+		return fmt.Sprintf("'%v' invalid", value)
+	case "vin":
+		return fmt.Sprintf("'%v' invalid", value)
+	case "url":
+		return "invalid url"
+	default:
+		return fmt.Sprintf("%s %s", tag, param)
+	}
+}